Jack



y 1964 J. N. MLAUGHLIN JACK Filed May 19. 1961 INVENTOR. JAMES N. M LAL/GHL/A/ ATTORNEY United States Patent 3,132,833 EACK James N. McLaughlin, R.F.D. 3, Monticello, Iowa Filed May 19, 1961, Ser. No. 111,350 2 Qlaims. (111. 248-357) This invention relates in general to jacks and in particular to an adapter for converting hydraulic cylinders into jacks.

Nearly all farmers have tractors which have hydraulic cylinders attached to them for actuating the tractor implements. Such cylinders are actuated by oil pumps mounted on the tractors and the cylinders are detachably connected to the tractors to allow them to be moved to diiterent positions.

It is an object of this invention to provide an adapter for a hydraulic cylinder to convert it into a jack.

Another object is to provide a hydraulic jack that can be obtained simply and quickly from a standard hydraulic cylinder found on tractors.

A feature of this invention is found in the provision for a base stand formed with a groove into which a hydraulic cylinder may be received.

Further objects, features and advantages of this invention become clear from the following description and claims when read in View of the drawings, in which:

FIGURE 1 is a perspective view of the jack of this invention, and

FIGURE 2 is a perspective view of a modification of the invention.

FIGURE 1 illustrates a hydraulic cylinder which has an output piston shah: 11 which extends from one end. A bracket 12 is attached to the other end of the cylinder and a crosspin 19 is mounted in bracket 12.

A bracket 13 is attached to shaft 1 1 and carries a crosspin 14.

A hearing member 16 is formed with an open side and is adapted to fit over bracket 13. Member 16 is formed with an opening 18 which receives a locking pin 17.

Pin 17 is removed from opening 18 when the bearing member is placed over bracket 13 and the pin 17 is inserted through opening 18 to pass under crosspin 14 and lock the bearing member 16 to the cylinder. The top of the bearing member forms a flat bearing surface for the jack.

A pair of hydraulic fluid hoses and 20 are attached to cylinder 10 and their opposite ends connect to a suitable hydraulic motor and control system. Such system may be on a tractor, for example.

A ground supporting member 21 is formed of angle irons 22 and 23 and are connected to opposite ends of member 24 and 26.

Member 24 is formed with a groove 27 and member 26 is formed with a groove 28.

A pair of pins 29 and 3-1 are attached to the top edges of members 24 and 26 on opposite sides of the grooves 27 and 28.

In operation, the cylinder 10 is removed from its operating position on a tractor and the bearing member 16 is attached.

The bracket 1-2 is inserted into grooves 27 and 28 until pin 19 rests on their bottoms.

The pins 29 and 31 rest against the shoulder of the cylinder to hold it in a rigid vertical position. Then the jack may be placed under an object to be raised and hydraulic power supplied to move shaft 11 and accomplished the lifting.

FIGURE 2 illustrates a modification of the ground supporting member to provide for its adaptability to a number of dilferent sizes of cylinders.

The cylinder 10 has hydraulic tubes 41 and 42 con nected to it.

Angle iron members 32 and 33 are connected by mern-' This structure allows cylinders of different sizes to by 7 supported by a single ground engaging member.

It is seen that this invention provides a simple and easy to assemble jack mechanism and although it has been described with respect to preferred embodiments, it is not to be so limited as changes and modifications may be made which are within the full intended scope as defined by the appended claims.

I claim:

1. A base plate for holding a hydraulic cylinder com prising a pair of ground engaging angle irons, a pair of upright members attached to the angle irons and formed with notches into which the lower end of the cylinder may be received, and a pair of cross-bars attached to the upright members on either side of the notch to support the cylinder.

2. A base for a hydraulic cylinder comprising, ground supporting means, a pair of uprights attached to the ground supporting means, a notch formed in the upright means, and a pair of pawls pivotally connected to the upright means on either side of the notch and engageable with the cylinder to firmly support it.

References Cited in the file of this patent UNITED STATES PATENTS 1,384,055 Ferguson July 12, 1921 2,181,163 Akins NOV. 28, 1939 2,524,490 SWett Oct. 3, 1950 2,582,896 Acton Jan. 15, 1952 2,827,116 Zalovcik Mar. 18, 1958 

1. A BASE PLATE FOR HOLDING A HYDRAULIC CYLINDER COMPRISING A PAIR OF GROUND ENGAGING ANGLE IRONS, A PAIR OF UPRIGHT MEMBERS ATTACHED TO THE ANGLE IRONS AND FORMED WITH NOTCHES INTO WHICH THE LOWER END OF THE CYLINDER MAY BE RECEIVED, AND A PAIR OF CROSS-BARS ATTACHED TO THE UPRIGHT MEMBERS ON EITHER SIDE OF THE NOTCH TO SUPPORT THE CYLINDER. 